4.1 Line contact
Simulations are done within the range of input displayed in Table 1. The roughness range covers the theoretically.
4.2 Point contact
For point-contact EHL, simulations are done within the range of input displayed in Table 2. The regression analyses are done for the results of more than 200 simulations. The results show that in point-contact EHL, the ratio of starved to fully-flooded film thickness is not only a function of the starvation degree, but also the ellipticity parameter. These ratios for the central and minimum film thickness are obtained as.
4.3 Verification of the model
In this section, the validity of the present numerical model is investigated. Unfortunately, no experimental data was found for the starvation in the mixed EHL regime. There are only a few experimental studies for the smooth surfaces (as mentioned in the introduction), but they are not based on the reduction of the mass flow rate. Here, the fully-flooded results from the present study are compared with those from other studies, and it is shown how the starvation changes the results.
4.4 Illustrative examples
To show the utility of the obtained formulas, three illustrative examples are presented next.
4.4.1 Contact between rollers.
4.4.2 Lift-off speed.
4.4.3 Ball-on-disk problem.
4.1 Line contactSimulations are done within the range of input displayed in Table 1. The roughness range covers the theoretically.4.2 Point contactFor point-contact EHL, simulations are done within the range of input displayed in Table 2. The regression analyses are done for the results of more than 200 simulations. The results show that in point-contact EHL, the ratio of starved to fully-flooded film thickness is not only a function of the starvation degree, but also the ellipticity parameter. These ratios for the central and minimum film thickness are obtained as.4.3 Verification of the modelIn this section, the validity of the present numerical model is investigated. Unfortunately, no experimental data was found for the starvation in the mixed EHL regime. There are only a few experimental studies for the smooth surfaces (as mentioned in the introduction), but they are not based on the reduction of the mass flow rate. Here, the fully-flooded results from the present study are compared with those from other studies, and it is shown how the starvation changes the results.4.4 Illustrative examplesTo show the utility of the obtained formulas, three illustrative examples are presented next.4.4.1 Contact between rollers.4.4.2 Lift-off speed.4.4.3 Ball-on-disk problem.
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